628735839 has 8 divisors (see below), whose sum is σ = 850826880. Its totient is φ = 412901016.

The previous prime is 628735819. The next prime is 628735853. The reversal of 628735839 is 938537826.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 628735839 - 2⁷ = 628735711 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 628735791 and 628735800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628735819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1563819 + ... + 1564220.

It is an arithmetic number, because the mean of its divisors is an integer number (106353360).

Almost surely, 2^628735839 is an apocalyptic number.

628735839 is a deficient number, since it is larger than the sum of its proper divisors (222091041).

628735839 is a wasteful number, since it uses less digits than its factorization.

628735839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3128109.

The product of its digits is 2177280, while the sum is 51.

The square root of 628735839 is about 25074.6054605053. The cubic root of 628735839 is about 856.6881090150.

The spelling of 628735839 in words is "six hundred twenty-eight million, seven hundred thirty-five thousand, eight hundred thirty-nine".